Smith is charged with first-degree premeditated murder in the deaths of 18-year-old Haile Kifer and 17-year-old Nick Brady. The retired U.S. State Department security officer told investigators he was defending himself when he shot the two cousins in his basement because he feared for his life after several break-ins.

Jurors are to decide on four counts, including two first-degree murder charges, which means Smith not only planned, but intended to kill.

Jurors could also decide on lesser charges of second-degree murder, meaning Smith intended to kill the teens, but it wasn't premeditated.

Prosecutor Pete Orput told jurors in his closing argument the killings were premeditated. He said the way Smith set himself up in his basement that day was almost like deer hunting, with the chair Smith sat in like a deer stand.

Smith shot the unarmed teens a total of nine times as they descended the stairs into his basement.